With the Double Action Hand Pump， you'll be able to puff up a flat air mattress， and turn a deflated raft into a water-worthy adventure-craft! Ordinary pumps only inflate on the downstroke， but this pump creates a continuous stream of air on both the down and the up-stroke. Its unique dual action system saves effort and inflates outdoor accessories faster. This pump is constructed of durable， high-impact plastic that won't discolor or corrode in damp environments， and is equipped with a non-kink hose with adapters to fit most commonly used valves.